JPH11341206A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an NCU substrate contained in a main lower case of facsimile equipment from being deteriorated by heat. SOLUTION: In a storage space 78 which is surrounded by a rear wall 1c, an upper wall 1e and a bottom cover 10 in a main lower case of facsimile equipment, a support plate 14a made of metallic sheet is electrically connected and erected by way of a bis 79 on the left side of a part near an rear end of the bottom cover 10 and an upper end is fixed by a bis 80 to the upper wall 1e. A parts side of an NCU substrate 14 fixed vertically on one side of the support plate 14a is arranged so that it faces the rear wall 1c, while a low voltage power source base plate 12 is fixed and arranged near the bottom cover 10 upper side by the bis or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a facsimile apparatus, and more particularly, to an arrangement structure of an NCU (network control unit) board for a telephone line.

[0002]

2. Description of the Related Art Conventionally, a facsimile apparatus has a document reading section, a recording section for recording facsimile data sent from another facsimile apparatus on a sheet, and a paper feeding section for supplying a sheet to the recording section. And a NCU board for communicating with other facsimile machines via telephone lines. And Japanese Patent Laid-Open No. 10-207
As disclosed in Japanese Patent Publication No. 38-38, etc., disposing a control board, a low-voltage power supply board, an NCU board, and the like on the bottom side of the main body case is disclosed. In this case, if all the boards are laid down substantially parallel to the bottom cover for covering the bottom of the main body case, the required area becomes large, the size of the facsimile machine cannot be reduced, and the connection with the modular jack is not possible. From the layout of connectors for
In some cases, the CU substrate is fixed in an upright state.

[0003]

However, since a low-voltage power supply board generates a large amount of heat compared to other circuit boards,
When the NCU board is arranged near the upper side, electronic components on the NCU board are easily deteriorated due to the heat.
As a countermeasure, expensive electronic components having heat resistance are used, and there is a problem that the manufacturing cost is increased.

Further, when the NCU substrate is fixed to an upward piece which is formed by bending an end of the bottom cover upward so as to be along the inner surface of the main body case so that its component surface faces the inside of the main body case. However, even if a vent hole is formed in the vertical wall surface of the main body case, there is a problem that the upwardly-facing piece hinders the cooling of the component part of the NCU substrate.

The present invention has been made to solve these problems, and an object of the present invention is to provide a facsimile apparatus having a high cooling effect on parts of an NCU substrate.

[0006]

In order to achieve this object, a facsimile apparatus according to the first aspect of the present invention comprises: a document reading unit; a recording unit; a paper supply unit for supplying a sheet to the recording unit; In a facsimile apparatus including an NCU board for a telephone line, a power supply board is laid down on a bottom cover in a main body case, and a ventilation hole formed in a vertical wall surface of the main body case. An NCU substrate to be erected with the component surfaces facing each other is mounted on a support plate arranged so as to block heat radiation from the power supply substrate.

According to a second aspect of the present invention, in the facsimile apparatus according to the first aspect, the support plate is formed of a metal plate, and at least a part of the support plate is formed of a metal. It is connected to the bottom cover and erected. According to a third aspect of the present invention, in the facsimile apparatus according to the first or second aspect, a window hole is formed in a part of a rear surface of the main body case, and the window hole is formed on a sub cover. On the top surface of the bottom cover, a control board is fixed to a portion near the window hole, and the NCU board is substantially parallel to the rear surface of the main body case on the side of the window hole. It is erected through a support plate.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of main components of a facsimile machine as an example of an electronic apparatus to which the present invention is applied, FIG. 2 is a schematic side sectional view of the facsimile machine,
FIG. 3 is a partially cutaway plan view of the facsimile apparatus, FIG. 4 is a plan view showing an arrangement of a control board, an NCU board, a cooling fan, a speaker and the like in a main body case, and FIG. 7 is a side showing an attached state of the NCU board. It is sectional drawing.

The main body case of the facsimile apparatus 1 is shown in FIG.
As shown in FIG. 1, a recording unit as a recording unit including the scanner unit 2, the process unit 3, and the fixing unit 4 and a paper supply unit 5 as a paper supply unit for supplying paper P for forming an image. A main lower case 1a made of synthetic resin to be mounted from the upper side;
a so that it can cover the upper side of a
An upper case 1b made of synthetic resin pivotally attached to a side rear portion of the main lower case 1a. On the upper surface of the upper case 1b, a document reading unit 6 and a document feeder 7 as a document reading unit are mounted. The operation panel 8 detachably covers the upper side of the document reading unit 6.

A drive system unit 9 including a drive motor and a gear train for transmitting power to the process unit 3, the fixing unit 4, and the paper feed unit 5 is housed in a storage recess on the left side of the main lower case 1a (see FIG. (Not shown). 2, FIG. 4, FIG. 6A, and FIG. 6A are provided on one side of the rear surface portion of the main lower case 1 a (the right side portion in the embodiment).
As shown in FIGS. 6 (b) and 8, a window hole 59 is formed from the lower edge of the rear wall 1c of the main lower case 1a to the rear surface and the upper surface above the lower connecting piece 1d as appropriate in the vertical dimension. ing. The window hole 59 is configured to be removably opened by an inverted L-shaped sub cover 62 in side view.

Further, a control board 1 is provided above a bottom cover 10 made of a metal plate which covers the lower surface of the main lower case 1a.
1. NCU for enabling conversation and transmission / reception of facsimile data with another telephone device or facsimile device via low voltage power supply substrate 12, high voltage power supply substrate 13, and telephone line
(Network control unit) A board 14 and the like are arranged. That is, as shown in FIG. 4, a high-voltage power supply board 13 for the charger 28 and the like of the process unit 3 is arranged on the upper surface of the bottom cover 10 at the front right side thereof in plan view.

As shown in FIGS. 2, 7 and 8, the upper end wall 1e, the rear end wall 1c and the rear end of the process unit 3 of the main lower case 1a on which the lower end of the paper feed unit 5 is mounted. Partition wall 1f facing the bottom cover 1
The space surrounded by 0 is divided into the control board 11, the low-voltage power supply board 12, the NCU board 14, an additional RAM (randomly readable and writable memory) board 60 and a LAN (local area network) board 61 as additional electronic components.
Storage space 78 that can store an optional board. The control board 11 is fixedly mounted on the upper surface of the bottom cover 10 with a screw or the like in a portion near the window hole 59 (a portion near the rear right end in the embodiment). A connector 76 for a cable 75 for connecting the control board 11 to an external device (not shown) such as a personal computer.
The support portion (base portion) is fastened to the upwardly-facing piece 10a rising from the rear end of the bottom cover 10 and the lower connecting piece 1c of the main lower case 1a together with a screw 77 (FIG. 6).
(A), FIG. 6 (b) and FIG. 8).

As shown in FIG. 7, the main lower case 1
In the storage space 78 on the left side of the window hole 59 of FIG. 4A, the left side of the bottom cover 10 near the rear end is electrically connected via a screw 79 to stand upright, and the upper end is screwed to the upper surface wall 1e.
At 0, a support plate 14a made of a metal plate also serving as a partition plate for magnetic field shielding is fixed. And the support plate 14a
Are arranged vertically so that the component side of the NCU substrate 14 fixed to one surface of the main lower case 1a faces the rear wall 1c of the main lower case 1a. A low-voltage power supply board 12 is fixedly mounted on the bottom cover 10 near the NCU board 14 with screws or the like. Therefore, the heat generated from the low-voltage power supply board 12 is blocked by the support plate 14a, so that it does not directly hit the component surface of the NCU board 14.

The rear wall 1 of the main lower case 1a is provided.
c and a large number of ventilation holes 50a, 50
By the air passing through b, the heat radiation from the low-voltage power supply board 12 can be efficiently discharged outside the apparatus, and the component surface of the NCU board 14 can be efficiently cooled. Further, a support plate 14 made of a metal plate is placed against the bottom cover 10 made of a metal plate.
a, the ground section of the NCU substrate 14 is electrically connected to the ground section (ground).
The CU substrate 14 can be firmly attached at the same time.

Since the partition plate 81 is set up inside the left end side of the window hole 59, when an operator puts his hand into the storage space 78 through the window hole 59, the NCU board 14 and the low-voltage power board are inadvertently inserted. It is configured not to come into contact with 12. NC
The modular connector 82 provided on the U board 14 is exposed on the side surface of the main lower case 1a, so that a telephone line modular jack (not shown) is connected.

In this configuration, when an optional board such as the additional RAM board 60 or the LAN board 61 is added, the sub cover 6 closing the window hole 59 is used.
2 is removed (see FIG. 6B) and put into the storage space 78. In order to mount the large-sized LAN board 61, after removing the metal plate connector cover 84, which is screwed in advance on the upward piece 10a or the like and closes the lower edge of the window hole 59, the LAN The male connector 83a projecting from the lower surface of the board 61 is inserted into and fixed to the female connector 83b projecting from the upper surface of the control board 11, while the base of the connector 85 projecting from the rear surface of the LAN board 61 has the same structure as described above. The upwardly-facing piece 10a rising from the rear end of the bottom cover 10 and the lower connecting piece 1 of the main lower case 1a
c and screws (not shown) (see FIG. 2).
And FIG. 8). Thereby, the bottom cover 10 made of a metal plate is formed.
The ground portion of the LAN board 61 is electrically connected to ground (ground), and the LAN board 61 is firmly attached.

As shown in FIG. 4, the additional RAM board 60 having a small shape may be attached via a connector 86 protruding from the upper surface of the control board 11. Next, the configuration of the recording unit and the like will be described. Paper feed unit 5
The leading end side of the paper P set in a state of being stacked in the feeder portion case 5a is pressed toward the paper feed roller 16 by the support plate 15 with the biasing spring 15a in the feeder portion case 5a. The paper feed roller 16 and the separation pad 17 that are rotated by power transmitted from the system unit 9
Separated one by one. The separated sheet P is fed to the upper side of the process unit 3 by a pair of upper and lower registration rollers 18 and 19, and the sheet P on which an image is formed by toner on the surface of the process unit 3 is transferred to the fixing unit 4. After the image is fixed by the heating roller 21 and the pressing roller 22, the image is discharged from the paper discharge port 20 and discharged onto a discharge tray (not shown).

A scanner unit 2 is provided at a position below the process unit 3 which is arranged substantially at the center of the main lower case 1a having a top open box shape in a plan view.
It is fixed to the stay part integrally formed on the upper surface side of the bottom plate part by a screw or the like. As shown in FIG. 2, a scanner unit 2 as an exposure unit has a laser emitting unit, a polygon mirror 23,
A lens 24, a reflecting mirror 25 and the like are arranged, and the upper support plate 2a
The laser beam is applied to the outer peripheral surface of the photosensitive drum 26 in the process unit 3 by passing through a glass plate that covers a horizontally long scanner hole formed so as to extend along the axis of the photosensitive drum 26. It is configured.

The process unit 3 includes the photosensitive drum 26 and the transfer roller 2 which rotates while being in contact with the upper surface thereof.
7, a scorotron type charger 28 disposed below the photosensitive drum 26, a developing roller 29 and a supply roller 3 disposed upstream of the photosensitive drum 26 in the sheet feeding direction.
0, a developer (toner) supply unit disposed upstream thereof, that is, a detachable toner cartridge 31, a cleaning device 32 disposed downstream of the photosensitive drum 26, and the like. An electrostatic latent image is formed on the outer peripheral surface of the photosensitive drum 26 by scanning a laser beam from the scanner unit 2 on the charged layer formed by the charger 28. The developer (toner) in the toner cartridge 31 is agitated by a stirrer (not shown) and released, and then carried on the outer peripheral surface of the developing roller 29 via the supply roller 30. The thickness is regulated. The electrostatic latent image on the photosensitive drum 26 is visualized by the developer adhering from the developing roller 29, and the transfer roller 27 and the photosensitive drum 2
6 is transferred to a sheet P passing between the sheets 6. Then, the developer remaining on the photosensitive drum 26 is collected by the cleaning device 32.

The process unit 3 is made into a cartridge by being incorporated in a synthetic resin case.
The cartridge-formed process unit 3 is detachably mounted on the main lower case 1a. As shown in FIGS. 1 and 2, the original reading unit 6 disposed on the upper case 1 b includes a horizontally long contact type image sensor (CIS) 34 disposed in a unit case 42 and a document feeder 7. A document separating / feeding roller 35 disposed in the vicinity,
A pair of transport rollers 36 and 37 disposed upstream and downstream of the transport with the contact type image sensor 34 interposed therebetween, respectively.
A drive motor unit for driving the rollers 35, 36, and 37 and a gear train accommodated in a frame.
(Not shown) sent one by one through the CIS 3 and the pressing plate 38 whose lower surface is arranged in a downwardly convex curved shape with white.
4 is configured to read an image of a document when passing through the upper surface of the document.

A cooling fan 4 for blowing air to the outside of the main lower case 1a is provided on the front right side of the main lower case 1a.
A storage section 44 for storing the sheet P 3 and a ventilation duct 45 extending in a direction orthogonal to the sheet P passage direction are formed so as to communicate with each other. In this case, as shown in FIG.
The upper plate 45a is formed in a substantially V-shape with a downward cross section, and the upper plate 45a is located between the process unit 3 and the fixing unit 4 disposed on the upper surface of the main lower case 1a. The heat of the heating roller 21 is not transmitted to the process unit 3 side. In addition, the lower end of the upper surface plate portion 45a having a substantially V-shaped downward cross section is continuously connected by a partition plate 46 made of a synthetic resin plate or the like, and a portion surrounded by these members becomes the ventilation duct 43. ing.

As shown in FIGS. 5, 6 (a), 6 (b) and 7, the rear wall 1c of the main lower case 1a.
(Place facing the NCU substrate 14) and the top wall 1e
And the sub cover 62 are provided with a large number of ventilation holes 50, respectively.
a, 50b are similarly drilled, and the cooling fan 43
Are provided on the right side surface of the main lower case 1a where
Are provided, and the air suction holes 53a, 53b are also provided at the rear left portion and the front left portion of the bottom cover 10.
Many 53b are drilled.

As shown in FIGS. 2, 5 and 8,
Inside the main lower case 1a, a ventilation hole 54 below the mounting portion of the sheet feeding unit 5, ventilation holes 55a and 55b at a position facing the rear surface of the process unit 3, and a hole at the top plate portion 45a. A ventilation hole 57 and a ventilation hole 57 are formed in a wall or the like that partitions the storage section 44 of the cooling fan 43.

A handset 64 for conducting a conversation with another telephone device is provided in the main lower case 1.
The speaker 66 for placing a call is mounted on a receiving stand 65 projecting outward from the left side of the main body 1a, and is fixed to the rear side of the right side inside the main lower case 1a. FIG. 9 is a block diagram showing a control system of the facsimile machine 1 to which the present invention is applied. The facsimile apparatus 1 sets various processing operations, reads a document image by the document reading unit 6, converts the document image into transmission data, and transmits the transmission data in response to various commands input from the user through the operation panel 8. Coding,
Facsimile data transmission / reception, decryption of received data, paper P in recording unit for decrypted facsimile data
And the CIS of the document reading unit 6
(Contact type image sensor) A copy (copying) processing function of reading an original by the 34 and forming an image on the paper P by the recording unit, and based on data transmission from an external device such as a personal computer (not shown), It also has a printer processing function for printing on P and a scanner processing function for transmitting image data read using the document reading unit 6 to the external device.

In order to perform these operations, the facsimile machine 1 is mounted on a control unit 11, a recording unit including an operation panel 8, a document reading unit 6, a scanner unit 2, a process unit 3, and a fixing unit 4 for laser light. Then, a CPU 67 for executing various controls and calculations, a ROM 68 storing a control program, a RAM 69 partly used as a reception buffer memory 69a, the NCU board 14, and other facsimile machines via the NCU board 14 are connected. A modem 70 for transmitting and receiving facsimile data between the transmitter and receiver, a handset 64 for conversing with another telephone device, a speaker 66 for calling, and a device for applying power to the respective driving units of the recording unit. Drive system unit 9 having the stepping motor of
A low-voltage power supply board 12 for supplying low-voltage power to
The process unit 3 includes a high-voltage power supply board 13 for supplying high-voltage power to the charger 28, a cooling fan 43 for discharging cooling air out of the machine, and a bus line 71 for connecting these.

An additional RAM board 60 for increasing the amount of memory which can be added at the request of the user, and a LAN board for constructing a network for transmitting data to and from external devices such as a plurality of computers. 61
Can be connected as shown in FIG. In the above configuration,
When power is turned on, each of the substrates 11, 12, 13, 14
, And various controls can be executed, while the cooling fan 43 is rotationally driven. Then, the cooling air sucked from the ventilation holes 50a and 50b such as the rear end face of the main lower case 1a passes through the surface portions of the NCU board 14, the control board 11, and the low-voltage power supply board 12, and then the lower surface of the scanner unit 2. While passing between the side and the bottom cover 10 and reaching the front of the main lower case 1a, the ventilation hole 54 below the mounting portion of the sheet feeding unit 5 and the ventilation hole 55a at a position facing the rear surface of the process unit 3. , 55b, passes between the upper surface of the process unit 3 and the upper case 1b via the ventilation holes 56 and the ventilation holes 57 at the upper surface plate portion 45a, and collects in the housing portion 44, and is used for cooling. It is released to the outside of the main body case by the fan 43. This allows
The heat of the heating roller 21 of the fixing unit 4 does not adversely affect the process unit 3.

The recording section of the facsimile apparatus to which the present invention is applied is not limited to the one using the electrophotographic image formation by the laser beam, but may be an ink jet printer or a printer using a thermal head.

[0028]

As described above, the facsimile apparatus according to the first aspect of the present invention comprises a document reading unit, a recording unit, a paper supply unit for supplying paper to the recording unit, and a telephone line. A facsimile apparatus comprising an NCU board and a power supply board laid down on a bottom cover in a main body case of the facsimile apparatus, and a component surface is formed in a ventilation hole formed in a vertical wall surface of the main body case. An NCU substrate to be erected facing up is attached to a support plate arranged so as to block heat radiation from a power supply substrate.

Therefore, heat from the power supply board disposed on the upper surface side of the bottom cover is blocked by the support plate, so that radiant heat does not directly hit the parts of the NCU board, and the component surface of the NCU board is vertically The cooling effect is improved by touching the cooling air passing through the ventilation hole formed in the wall in the direction. Thus, the components used for the NCU substrate do not have to be expensive and have high heat resistance, and this has the effect of reducing the manufacturing cost.

According to a second aspect of the present invention, in the facsimile apparatus of the first aspect, the support plate is formed of a metal plate, and at least a part of the support plate is made of a metal. Since it is connected to the bottom cover and erected, the ground portion of the NCU substrate is electrically connected to the bottom cover made of a metal plate via a support plate made of a metal plate. (Grounding) and firmly mounting the NCU substrate can be achieved at the same time.

According to a third aspect of the present invention, in the facsimile apparatus according to the first or second aspect, a window hole is formed in a part of a rear surface of the main body case, and the window hole is formed. On the top surface of the bottom cover, a control board is fixed at a position near the window hole, and the NCU is arranged substantially parallel to the rear surface of the main body case beside the window hole. The substrate is erected through the support plate.

The operator's hand enters the inside, for example, by removing the sub-cover and mounting an electronic component to be added from the window hole, and in this case, the rear surface of the main body case beside the window hole. If the NCU substrate is erected through the support plate substantially in parallel with the NCU substrate, it becomes difficult for a worker's hand to carelessly touch the NCU substrate, eliminating the cause of failure and increasing safety. This has the effect.

[Brief description of the drawings]

FIG. 1 is a perspective view of main components of a facsimile machine.

FIG. 2 is a schematic side sectional view of the facsimile machine.

FIG. 3 is a partially cutaway plan view of the facsimile apparatus.

FIG. 4 is a plan view showing an arrangement of a bottom cover, a control board, and the like covering a lower surface of a main lower case.

FIG. 5 is a plan view of a main lower case.

FIG. 6A is a perspective view of a rear portion of the facsimile machine,
(B) is a perspective view of the rear part of the facsimile apparatus with the cover removed.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6 (b).

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 6 (b).

FIG. 9 is a block diagram of a control unit.

[Explanation of symbols]

 P paper 1 facsimile machine 1a main lower case 1b upper case 1c rear wall 1e top wall 10 bottom cover 11 control board 12 low voltage power supply board 14 NCU board 14a support plate 50a, 50b ventilation hole 59 window hole 60 RAM board 61 LAN board 62 sub Cover 78 Storage space 82 Modular connector

Claims (3)

[Claims] 1. A facsimile apparatus comprising a document reading unit, a recording unit, a paper supply unit for supplying paper to the recording unit, and an NCU board for a telephone line. While the power supply board is laid on the cover, the NCU board to be erected with the component surface facing the air hole formed in the vertical wall surface of the main body case to block heat radiation from the power supply board. A facsimile apparatus characterized by being mounted on a support plate arranged as described above. 2. The facsimile machine according to claim 1, wherein said support plate is formed of a metal plate, and at least a part of said support plate is connected to a metal bottom cover and erected. apparatus. 3. A window hole is formed in a part of the rear surface of the main body case, and the window hole can be opened and closed by a sub cover.
On the upper surface of the bottom cover, a control board is fixed to a portion close to the window hole, and the NCU board is erected through the support plate substantially in parallel with the rear surface of the main body case on the side of the window hole. The facsimile apparatus according to claim 1 or 2, wherein